BItcoin, the controversial digital currency, will become a mainstream option for online shoppers in 2014, as just another digital currency like PayPal and Google Wallet.

So predicts Revel Systems, a provider of iPad-based Point of Sale (POS) systems for retailers.

Separately, in a bit of good timing for that prediction, online retail site Overstock.com just announced today that it plans to become the first major U.S. retailer to accept Bitcoin payments in second half of 2014.